Collectors including former SAC Capital bigwigs Steven A. Cohen and David Ganek, Third Point’s Daniel Loeb and “homeless billionaire” Nicolas Berggruen have been seen perusing the $4 billion worth of art on offer this week at Art Basel in Switzerland.

Among top sales, an Andy Warhol self-portrait sold for a cool $32 million in the fair’s first 15 minutes on Wednesday, and a Jeff Koons dolphin sculpture was snapped up for $5 million.